Which of these is not true of enzymes? a. enzymes speed up reactions in cells. b. enzymes work the same at all temperatures. c. enzymes work only in a relatively narrow ph range. d. enzymes work on specific chemicals?

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.

What molecule does hemoglobin decay into over time

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?